$xml_file = file_get_contents(SITE_PATH . \'cms/data.php\');
The problem is that a server has URL file-access disabled. I cannot enable it, its a h
Yes, if you have URL wrappers disabled you should use sockets or, even better, the cURL library.
If it's part of your site then refer to it with the file system path, not the web URL. /var/www/..., rather than http://domain.tld/....
/var/www/...
http://domain.tld/...